CN110177591B

CN110177591B - Inhaler

Info

Publication number: CN110177591B
Application number: CN201780071705.4A
Authority: CN
Inventors: 奥利维斯艾瑞克·卡德伦; 丹尼尔·巴克; 艾瑞卡·杰米·坎特; 罗斯·威廉·韦尔; 詹姆斯·罗奇; 史蒂文·大卫·加德纳; 罗伯特·欧文·凯维琳
Original assignee: Norton Waterford Ltd
Current assignee: Norton Waterford Ltd
Priority date: 2016-11-18
Filing date: 2017-09-14
Publication date: 2021-11-19
Anticipated expiration: 2037-09-14
Also published as: EA201991218A1; IL314077A; EP3733233A1; JP2022058665A; NZ753553A; US20210220579A1; AU2017359597A1; JP2020500067A; EP3506971A1; EA039125B1; US20180140788A1; US11000653B2; AU2017359597B2; JP7014791B2; KR102491841B1; IL266617B1; US20240390609A1; CN114159656A; EP3506971B1; WO2018091957A1

Abstract

The introduction of electronic components into drug delivery devices may present certain technical challenges, such as durability, mechatronics, and drug delivery performance. The present disclosure provides a solution for the fusion of an electronic module and an inhaler. For example, thermal posts may be used to secure a printed circuit board (PCB) to the housing of the electronic module. Also for example, a slider can be used to transfer the vertical movement of the inhaler yoke to the switch of the electronic module. Also for example, certain seals may be used to achieve desired performance when interfacing the electronic module with other parts of the housing of the device.

Description

Inhaler

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. provisional patent application No. 62/424,299 filed on 2016, month 11, and day 18, the contents of which are incorporated herein by reference.

Background

Drug delivery devices facilitate the delivery of drugs to a patient's body by a variety of routes of administration. Typical routes of administration include oral, topical, sublingual, injection, and the like. The device can deliver drugs for the treatment of various diseases, ailments and conditions. For example, inhalation devices may be used to treat asthma, Chronic Obstructive Pulmonary Disease (COPD), and Cystic Fibrosis (CF). While drug delivery devices are designed to deliver appropriate doses of drugs to patients (as part of therapeutic treatment), the effectiveness of a particular treatment may be affected by non-physiological factors, such as patient adherence and compliance.

Adherence, in the context of medication, may refer to the extent to which a patient follows a prescribed dosage regimen. For example, if a patient's prescription requires two doses per day, and the patient is taking two doses per day, the patient may be considered 100% adherence. If a patient is taking only one dose per day, he or she may be considered a 50% adherence. In the latter case, the patient does not receive the treatment prescribed by his or her doctor, which may negatively affect the effect of the therapeutic treatment.

Compliance may refer to the means of the patient when using a particular drug delivery device. If the patient uses the device in the manner recommended by the doctor or manufacturer, the device is likely to provide the desired dose of medication and the patient may be considered compliant. However, if the device is improperly used during administration, the device's ability to deliver the proper dose of medication may be compromised. Thus, the patient may be considered non-compliant. For example, in the case of an inhalation device, the patient may need to achieve minimal inhalation effort to ensure that a full dose of medicament is delivered from the device into the patient's lungs. For some patients, such as children and the elderly, meeting the requirement for full compliance may be difficult due to physical limitations, such as limited lung function. Thus, failure to achieve complete compliance, like adherence, may reduce the effectiveness of prescribed therapy.

The ability of a patient to achieve full compliance may be further complicated by certain physical characteristics of the medication. For example, some respiratory medicaments may consist of granules and/or may lack any odor or taste. Thus, a patient using an inhalation device may not be able to correct an inconsistent use because he or she may not be able to immediately find or feel that a medication is being inhaled and/or know whether the amount of inhaled medication meets a prescription.

Disclosure of Invention

To improve adherence and compliance, the drug delivery device may suitably comprise an electronic module configured to detect, track and/or process usage conditions and parameters related to the device. The electronic module may further be configured to communicate conditions and parameters to an external device (e.g., a smartphone) for analog and/or further processing. The convergence of electronic modules in drug delivery devices opens a door to the rich digital improvements and functionality to enhance the use of the device. In this context, the electronic module can create a platform to take advantage of useful smartphone applications and powerful data analysis. However, the introduction of electronic components into any drug delivery device may present certain technical challenges such as durability, mechatronics, and drug delivery performance. The present disclosure provides a solution to the integration of certain electronic components with a drug delivery device, such as an inhaler.

Examples of inhalation devices (e.g., breath-actuated inhalers) are provided herein. An exemplary inhaler may include heat stakes for securing a Printed Circuit Board (PCB) to a housing of an electronic module, such as a module cap. The heat stake may be configured to partially deform when the PCB is secured to the housing. The use of heat stake posts can improve the durability of the inhaler, including, for example, reducing the risk of damage or inoperability of the electronics module due to the inhaler being dropped. The use of heat stakes to secure the PCB to the cover may reduce manufacturing costs and/or manufacturing time.

Also for example, a slider may be used to transfer the vertical movement of the inhaler yoke (yoke) to the switch of the electronics module. The movement of the inhaler yoke may be associated with typical inhaler operation, for example, the movement of the yoke may be related to the opening and closing of a mouthpiece cover (mouthpiece cover) of the inhaler. Here, the slider may effectively integrate the electronic module into operations familiar to the user, increasing the overall level of mechatronics of the inhaler. That is, the user may easily perceive the activation of the electronic module when the user operates the inhaler.

Also for example, some seals may be used or formed when the electronics module interfaces with other portions of the inhaler housing to achieve the desired performance. The electronics module may include a pressure sensor to measure pressure changes within the inhaler. These pressure variations can be used to calculate or determine various aspects of inhaler performance, such as airflow rate through the inhaler's airflow path. As described herein, the seal may ensure that the measured pressure changes are effectively translated into operational performance parameters of the inhaler.

Brief Description of Drawings

Fig. 1A is a perspective view of an exemplary inhaler having an electronic module.

Fig. 1B shows a partially exploded view of an exemplary inhaler with an electronic module.

Fig. 1C shows a partially exploded view of an exemplary inhaler with an electronic module.

Fig. 1D shows a cross-sectional view of an exemplary inhaler with an electronic module.

Fig. 2A shows an exemplary electronics module for an inhaler.

Fig. 2B shows a partially exploded view of an exemplary electronics module for an inhaler.

Fig. 3 shows an exemplary slider for an electronics module of an inhaler.

Figures 4A-B show projection views (projection views) of an exemplary slider for an electronics module of an inhaler.

Fig. 5A-D illustrate the operation of the slider in the inhaler.

Figure 6 illustrates an exemplary mouthpiece of an inhaler with multiple bypass vents.

Detailed Description

Fig. 1 depicts an inhaler 100 comprising a mouthpiece 120, a mouthpiece cover 130, an outer housing 190, a yoke (not visible) and an electronics module 105. Outer housing 190 includes an upper housing 140, and upper housing 140 may interface with lower housing 150. The upper housing 140 and the lower housing 150 may be removably attached or permanently attached to each other, thereby forming the seal 125. The housing 190 may also include an electronic module 105. The upper housing 140 and the lower housing 150 may be removably attached or permanently attached to each other, thereby forming the seal 125. The housing 190 may also include an electronic module 105. The electronic module 105 may have a cap 110 (e.g., an electronic module cap) that interfaces with the upper housing 140. The cap 110 and the upper housing 140 may be removably attached or permanently attached to each other, thereby forming a seal 127.

Fig. 1B shows a partially exploded view of the inhaler 100, which includes an interface between the upper housing 140 and the lower housing 150. In particular, the lower housing 150 may have a top portion 155 that defines the upper outer surface 152. The upper outer surface 152 may include a seal 156, which may be a labyrinth seal. The upper outer surface 152 may be received within the upper housing 140 and overlap at least a portion of the lower inner surface of the upper housing 140. Lower housing 150 may define a rim 153, and rim 153 may abut bottom edge 148 of upper housing 140 when lower housing 150 and upper housing 140 are interconnected. The interface between the bottom edge 148 and the rim 153 may define a seal 125 (shown in fig. 1A).

The lower housing 150 may also define one or more grooves 154, and the grooves 154 may be configured to receive a respective one or more clips or protrusions (not shown) on the lower interior face of the upper housing 140. The engagement of one or more grooves 154 with one or more clips or protrusions may further inhibit or inhibit the separation of upper housing 140 from lower housing 150.

FIG. 1B further depicts the interface between the upper housing 140 and the cap 110. More specifically, the cap 110 may define an inner peripheral surface 112 and a rim 113, which may be chamfered. The cap 110 may further include one or more clips or protrusions 114 extending from the inner peripheral surface 112. Upper housing 140 may define a top portion 145 having a first cross-sectional area and a bottom portion 147 having a second cross-sectional area. The first cross-sectional area may be less than the second cross-sectional area. The top portion 145 of the upper shell 140 may include an upper outer surface 142, and the upper outer surface 142 may be configured to be received within the cap 110 and overlap at least a portion of the inner peripheral surface 112 of the cap 110.

Bottom portion 147 of upper housing 140 can define a rim 143, and rim 143 can define a transition from a first cross-sectional area of top portion 145 to a second cross-sectional area of bottom portion 147. The rim 113 of the cap 110 may abut the rim 143 when the cap 110 is attached or mounted to the upper housing 140. The interface between rim 113 and rim 143 may define a seal 127, as shown in FIG. 1A.

The top portion 145 of the upper housing 140 may define one or more grooves 144, and the grooves 144 may be configured to receive one or more clips or protrusions 114 within the cap 110. The engagement of the one or more grooves 144 with the one or more clips or protrusions 114 may further prevent or inhibit the cap 110 from separating from the upper housing 140.

The upper housing 140 may also include a top surface 149, and the top surface 149 may define one or more apertures 146. One or more apertures 146 may receive the slider 116, and the slider 116 may be slidably mounted within the electronic module 105. It should be appreciated that having more than one aperture 146 may allow the upper housing 140 and/or the cap 110 to be axially rotated 180 degrees without affecting the manner in which they are attached to one another. In other words, if the upper housing 140 and/or the cap 110 is axially rotated 180 degrees, the slider 116 may still be received by the at least one aperture 146.

The inhaler 100 may include a yoke 170 enclosed within the upper housing 140. Yoke 170 may be cylindrical and may define a hollow portion therein. For example, the yoke 170 may house a bellows (e.g., bellows 180 shown in fig. 1D) within the hollow portion. The top surface 172 of the yoke 170 may include one or more apertures 174. The yoke 170 can be mechanically coupled to the suction cover 130 such that the yoke 170 can move axially along the shaft 176 as the suction cover 130 moves between the open and closed positions. For example, the yoke 170 may be mechanically coupled to the suction cap 130 by a hinge mechanism 160. The yoke 170 may be mechanically connected to the suction port cover 130 by cam followers 178, the cam followers 178 extending within the lower housing 150 from the hinge mechanism 160 to a belt 179 remote from the hinge mechanism 160 on either side of the suction port 120. The belt 179 may be enclosed within the lower housing 150. The belt 179 may be configured to engage a bottom edge 171 defined by the yoke 170 such that the cam follower 178 is mechanically connected to the yoke 170. The cam followers 178 may be configured to engage the respective cams 162 of the hinge mechanism 160 of the suction cover 130. When the suction cap 130 is opened, the cam 162 of the hinge mechanism 160 may be rotated, causing the cam follower 178 to move along the shaft 176, such that the yoke 170 may move along the shaft 176 in a direction toward the lower housing 150. Movement of the yoke 170 along the shaft 176 may cause the bellows to compress, causing the dose of medication to be transferred to a dose cup (not shown) within the lower housing 150.

As described above, the electronic module 105 may include components for monitoring parameters related to the use and operation of the inhaler 100. For example, the electronics module 105 may include a pressure sensor (not shown) for detecting pressure changes within the housing 190 (more specifically, within the cap 110) caused by the patient inhaling or exhaling at the mouthpiece 120. A negative change in pressure may indicate inspiration, while a positive change in pressure may indicate expiration. The electronics module 105 may correlate the measured pressure change to the airflow rate through the airflow passage 189. For example, the electronic module 105 may determine the rate of airflow caused by the patient inhaling or exhaling at the mouthpiece 120. The measured airflow rate may represent an average airflow rate during inspiration or expiration. The measured airflow rate may also represent a peak airflow rate. The measured rate of airflow may be indicative of the quality of the patient's inhalation. That is, a higher flow rate may generally be associated with a stronger inhalation, which may increase the likelihood of delivering a full dose of the drug to the patient's lungs. Conversely, a lower flow rate may generally be associated with a weaker inhalation, which may reduce the likelihood of delivering the full dose of the drug to the patient's lungs. Thus, by measuring and tracking the airflow rate through the airflow passageway 189 each time the inhaler 100 is used, the electronic module 105 may be configured to generate adherence and compliance data that may be useful to patients and other third parties (e.g., healthcare providers).

The seal 127 (e.g., mechanical interface) between the cap 110 and the upper housing 140 may be configured to enable the electronic module 105 to properly measure and/or detect the operational characteristics and/or statistics of the inhaler. For example, the length of overlap between the upper outer surface 142 of the upper housing 140 and the inner peripheral surface 112 of the cap 110 may be configured such that an adequate gas seal is maintained at the seal 127 between the cap 110 and the upper housing 140. In particular, the air seal may be sufficient to allow the pressure sensor within the electronics module 105 to detect pressure changes within the housing 190 (particularly within the cap 110) caused by a patient inhaling at the opening 122 of the mouthpiece 120 and to enable the electronics module 105 to correctly correlate such pressure changes with the airflow rate through the airflow passageway 189 of the inhaler 100. If the seal 127 is not effective and allows excess ambient air to enter the seal 127, the suction at the opening 122 may result in a lower than expected pressure change. Thus, in such a case, any pressure change detected by the pressure sensor may not accurately reflect the actual airflow rate through the airflow passage 189.

Fig. 1C depicts another partially exploded view of the inhaler 100. As shown, the cap 110 of the electronic module 105 may receive a Printed Circuit Board (PCB)118, which may have a rim 117 defining a notch 119. The PCB118 may be attached to the cap 110 by a plurality of heat stakes, as further described herein. For example, the heat stake may be configured to retain the PCB118 within the cap 110 and/or to meet drop test requirements without the use of fasteners. The slider 116 may be mechanically coupled to the PCB118 to operate the suction cap 130. For example, when the mouthpiece cover 130 is opened to expose the mouthpiece 120, the slider 116 may be moved axially to activate a switch (e.g., switch 222 shown in fig. 2A and 2B) on the PCB 118.

A first (e.g., upper) portion of the slider 116 may protrude from the notch 119 when the slider 116 is slidably mounted within the electronic module 105. A second (lower) portion of the slider 116 may extend from one of the apertures 146 and into the upper housing 140. As discussed further herein, a slider spring (such as slider spring 260 shown in fig. 2B) within the electronic module 105 may bias the slider 116 in a downward direction, i.e., push the slider toward the lower housing 150. Likewise, the slider spring may cause the end of the slider 116 to remain in contact with the top surface 172 of the yoke 170 within the upper housing 140 and continuously abut against the top surface 172 of the yoke 170. Thus, the slider 116 may move axially along the shaft 176 with the yoke 170 as the suction cap 130 moves between the open and closed positions.

Fig. 1D is a cross-sectional view of the inhaler 100. The inhaler 100 may have an activation spring 182 disposed within the upper housing 140 and a bellows 180 disposed within the yoke 170. Activating the spring 182 may bias the yoke 170 against the bellows 180. When the suction port cover 130 is opened to expose the suction port 120, the yoke 170 may be axially moved in a direction toward the lower housing 150. The deflection from the yoke 170 caused by the activation of the spring 182 may cause the bellows 180 to compress, thereby causing a dose of medication to be transferred from the medication box 184 to a dose cup 186 located in the lower housing 150. As mentioned above, the inhaler 100 may be a breath-actuated DPI. Accordingly, inhaler 100 can include a dephlegmator (dephlegmator) 187, and dephlegmator 187 can be configured to aerosolize the dose of medicament by disrupting agglomerates of the medicament in dose cup 186 when the airflow through airflow passage 189 meets or exceeds a particular rate, or is within a particular range. When aerosolized, the dose of medication may be delivered orally to the patient via an airflow passage 189 extending through the mouthpiece 120.

The airflow passage 189 may be a drug delivery airflow passage that extends from the opening 122 in the mouthpiece 120 through the dephlegmator 187 and through the exhaust vent 188 in the lower housing 150. The exhaust port 188 may serve as an inlet for the gas flow passage 189. The opening 122 in the suction opening 120 may serve as an outlet for the airflow passage 189. When the patient inhales or inhales, the medicament may be introduced into the airflow passage 189. For example, when a patient inhales or inhales from the mouthpiece 120, air is drawn into the dephlegmator 187 through the exhaust vent 188. Air is then drawn through dephlegmator 187 where it mixes with the drug. The air-drug mixture may exit the inhaler 100 through an opening 122 in the mouthpiece 120.

The seal 127 between the cap 110 and the upper housing 140 may be configured so as not to adversely affect drug delivery. For example, the dephlegmator 187 may be configured to aerosolize the doses of medicament from the medicament cabinet 184 when the airflow rate through the airflow passage 189 reaches or exceeds 30LPM, or preferably, when the airflow rate reaches or exceeds 45 LPM. Thus, the inhaler 100 may be configured to generate a particular airflow rate through the airflow passage 189 when a certain pressure is applied at the opening 122 of the mouthpiece 120. If there are unwanted gaps or openings in the housing, the relationship between the airflow rate and the applied pressure may change. That is, if the airflow resistance associated with airflow passage 189 has changed (e.g., decreased) due to excessive ambient air entering housing 190 through seal 127, a higher pressure (e.g., stronger suction) at opening 122 may be required. This increased pressure (or stronger inhalation) may exceed the physical capabilities of a patient with limited lung function. Thus, sufficient sealing of the seal 127 between the upper housing 140 and the cap 110 may affect the ability of the inhaler 100 to deliver an appropriate dose of medicament.

In summary, the mechanical interface between the cap 110 and the upper housing 140 may be configured such that, at a given pressure applied at the opening 122, the airflow rate through the airflow path 189 of the inhaler 100 may be substantially similar to the airflow rate through the airflow channels 189 of the inhaler 100 without the electronic module 105 and/or where the top portion 145 of the upper housing 140 does not include any openings (such as the orifice 146). Preferably, the gas flow rates may be within 2% of each other at a given applied pressure.

In addition, a suitable airflow resistance associated with the airflow passages 189 of the inhaler 100 may be at 0.020 kilopascals per liter per minute (kPa)^0.5/LPM) to 0.042kPa^0.5In the/LPM range. More preferably, the airflow resistance associated with the airflow passages 189 of the inhaler 100 may be at 0.025kPa^0.5LPM to 0.037kPa^0.5In the/LPM range. Even more preferably, the airflow resistance associated with the airflow passage 189 of the inhaler 100 may be at 0.028kPa^0.5LPM to 0.034kPa^0.5In the/LPM range.

A suitable airflow rate associated with the airflow passage 189 of the inhaler 100 may be in the range of 50LPM to 80LPM when a pressure drop of 4.0kPa is applied across the airflow passage 189. More preferably, the airflow rate associated with the airflow passageway 189 of the inhaler 100 may be in the range of 55LPM to 75LPM when a pressure drop of 4.0kPa is applied to the airflow passageway 189. Even more preferably, the airflow rate associated with the airflow passageway 189 of the inhaler 100 may be in the range of 59LPM to 71LPM when a pressure drop of 4.0kPa is applied to the airflow passageway 189.

Fig. 2A depicts an exemplary electronics module 105 for the inhaler 100. Fig. 2B shows a partially exploded view of an exemplary electronics module 105 for the inhaler 100. The electronic module 105 may include a cap 110, a PCB118, a battery 230, a battery holder 240, and a slider 116. The PCB118 may be mounted within the cap 110.

A respiratory device, such as inhaler 100, may need to successfully pass a drop test (drop test). Drop testing may include dropping the respiratory device from a predetermined height to assess the extent to which the operation and/or performance of the device is adversely affected. Fastening the PCB118 to the cap 110 with fasteners (e.g., screws, rivets, etc.) may result in failure of the drop test. For example, when the PCB118 is attached to the cap 110 with fasteners, the operation and/or performance of the inhaler 100 may be adversely affected. The use of fasteners to secure the PCB118 to the cap 110 may also increase manufacturing costs and/or manufacturing time. Accordingly, the cap 110 may include a plurality of heat stake posts, such as heat stake posts 212, 214.

For example, the heat stake posts 212, 214 may be configured to secure the PCB118 to the cap 110 without the use of fasteners. The heat stake posts 212, 214 may protrude or extend from the top interior surface 220 of the cap 110. The heat stake 212 may have a circular cross-section. The heat stake 212 may have a smaller diameter than a standard heat stake. That is, the diameter of the heat stake 212 may be selected so that the inhaler 100 successfully passes the drop test without taking up too much space on the PCB 118. Preferably, the diameter of the heat stake 212 may be less than 1.4 millimeters. The PCB118 may have a plurality of

openings

224, 226, 228, as shown in fig. 2B. One or more of the openings (e.g., opening 226) may correspond to the heat stake 212 such that when the PCB118 is mounted within the cap 110, the heat stake 212 may be adapted to protrude from the PCB118 via the opening 226.

The heat stake posts 214 may have a non-circular cross-section, such as a rib-shaped cross-section. For example, the plurality of openings on the PCB118 may include notches 224 corresponding to the location of the heat stake 214. The PCB118 may define a notch 224 such that the heat stake 214 may be adapted to protrude from the PCB118 via the notch 224 when the PCB118 is installed within the cap 110. Each of the heat stake posts 212 and the heat stake posts 214 may define a distal end opposite the top interior surface 220 of the cap 110. Each of the heat stake posts 212 and the distal end of the heat stake post 214 may be configured to partially deform when heated to a predetermined temperature. The partially deformed heat stake 212 and the heat stake 214 may secure the PCB118 to the cap 110.

The PCB118 may include a switch 222, which may be a toggle switch or a detector switch. The arm of the detector switch may have a greater range of movement, or a greater tolerance (tolerance), than the range of movement of the toggle switch. Likewise, the detector switch, when engaged/disengaged by the slider 116, may have a lower risk of damage. For example, when activated, the switch 222 may provide a wake signal to the electronic module 105. The wake-up signal may transition the electronic module 105 from the first operating state to the second operating state. The first operating state may be an off state or a sleep state. The second operational state may be an active state (e.g., on).

The electronics module 105 mounted on the top of the inhaler (e.g., distal to mouthpiece 120) may include an adapter arrangement that mechanically engages the switch 222 as the mouthpiece cover 130 is opened and/or closed. For example, the slider 116 may be configured to activate the switch 222. For example, the switch 222 may be positioned adjacent the notch 119 such that the slider 116, as it moves axially, activates the switch 222 and deactivates the switch 222. As described herein, the slider 116 can move axially as the suction cover 130 is opened and closed.

The cap 110 may include slider guides 216. The slider guide 216 may extend from a top interior surface 220 of the cap 110. The slider guide 216 may be configured to receive the slider 116 such that the slider is slidably mounted within the cover 110. For example, the slider guide 216 may be configured to accept a portion of the slider 116. The slider guide 216 may define a stop 217. The stop 217 may be configured to retain the slider 116 within the slider guide 216. For example, the stop 217 may be further configured to limit axial travel of the slider 116 when the suction cap 130 is opened and/or closed.

The cap 110 may define a plurality of reference ribs (datum ribs) 211. The reference rib 211 may be configured to support the PCB 118. The reference rib 211 may be configured to position the PCB118 at a predetermined distance from the top interior surface 220 of the cap 110. The reference ribs 211 may be any shape and may be configured to allow clearance for electrical components (electrical components) mounted on the PCB 118. The cap 110 may define a plurality of grooves 213. The recess 213 may be a cavity on the top interior surface 220 of the cap 110. The groove 213 may be configured to allow clearance for one or more electrical components mounted on the PCB 118. For example, the groove 213 may receive respective portions of one or more electrical components mounted on the PCB 118.

The PCB118 may further include a processor and a transmitter. The PCB118 may be installed near the end of inhaler manufacture (e.g., after the inhaler is balanced). Mounting the PCB118 near the end of the inhaler 100 manufacture may be advantageous because the balancing of the inhaler 100 may damage sensitive electronic components on the PCB 118. Equilibration may include filling the inhaler 100 with a drug and holding the inhaler 100 at a predetermined temperature and humidity for a period of time (e.g., four weeks) prior to final packaging of the inhaler 100.

The battery holder 240 may be a through-hole type battery holder. For example, the battery holder 240 may define a base 242 and two legs 244. The length 244 of the legs may be configured such that the battery holder 240 may accept the battery 230. The base 242 may include a curved rim 246. The curved rim 246 may be configured to allow access to the battery 230. The battery holder 240 may have tabs 248 extending from the legs 244. The appendage 248 can extend from substantially perpendicular to the leg 244 of the base 242. The tab 248 may be configured to attach the battery holder 240 to the PCB 118. For example, the tab 248 may extend through the opening 228 defined by the PCB 118. The tab 248 may be flexible such that the tab bends and engages the opening 228 such that the battery holder 240 is removably attached to the PCB 118.

The battery holder 240 may be configured to maintain the battery 230 in contact with the PCB 118. The battery holder 240 may be fixed on the PCB 118. The battery holder 240 may be configured such that an electrical connection may be made between the PCB118 and the battery 230 (e.g., a button cell). One or more components of the PCB118 may be selectively activated based on the position of the suction cap 130. For example, activation of the switch 222 (e.g., activation of other switching means such as an optical sensor, accelerometer, or hall effect sensor) may cause the processor and/or transmitter to wake up from an off state (or power saving sleep mode) to an on state (or active mode). Conversely, deactivation of the switch 222 may cause the processor and/or transmitter to transition from an on state (or active mode) to an off state or low power mode.

As described above, the PCB118 may include sensors (not shown) that may provide information to the processor regarding patient inhalation. The sensor may be a pressure sensor, such as a MEMS or NEMS pressure sensor (e.g., barometric pressure sensor, differential pressure sensor, etc.). For example, the sensor may provide information using pressure changes and/or pressure differences. The sensor may provide instantaneous pressure readings and/or accumulated pressure readings over time to the processor. The processor may also use this information to determine an airflow rate associated with the inhalation of the patient through the airflow passage 189. The processor may also use this information to determine the direction of airflow. That is, a negative change in air pressure through the air flow passage 189 may indicate that the patient has inhaled from the mouthpiece 120, while a positive change in air pressure through the air flow passage 189 may indicate that the patient has exhaled into the mouthpiece 120.

The electronic module 105 may further include wireless communication circuitry, such as a bluetooth chipset (e.g., a bluetooth low energy chipset). Likewise, the electronic module 105 may provide pressure measurements to an external device (e.g., a smartphone), which may perform additional calculations on the pressure measurement data, provide feedback to a user, and/or the like. The electronic module 105 may include control circuitry, which may be part of the communication circuitry, for example.

Based on information or signals received from the switch 222 and/or the sensor, the electronic module 105 may determine whether the mouthpiece cover 130 has been opened or closed, and whether the received pressure measurement exceeds a threshold or is within a particular pressure range, which may indicate whether the medication being inhaled by the user has reached a predetermined or prescribed level. The pressure measurement threshold and/or range may be stored in a memory of the electronic module 105. When a predetermined threshold or range is met, the electronic module 105 may determine the status of the inhaler 100 and may generate a signal indicative of the status of the inhaler 100.

The electronics module 105 may include a memory (not shown) for storing data collected by the sensors (e.g., pressure measurements) and/or data generated by the processor (e.g., airflow rate). The stored data may be accessed by the processor and wirelessly communicated with an external device (e.g., a smartphone) via wireless communication circuitry. The memory may be non-removable memory and/or removable memory. The non-removable memory may include Random Access Memory (RAM), Read Only Memory (ROM), a hard disk, or any other type of storage device. The removable memory may include a Subscriber Identity Module (SIM) card, a memory stick, a Secure Digital (SD) memory card, and the like. The electronic module 105 may access information from a memory (such as on a server or smartphone) and store data in the memory (such as on the server or smartphone) that is not physically located within the inhaler 100.

The processor of the electronic module 105 may include a microcontroller, a Programmable Logic Device (PLD), a microprocessor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or any suitable processing device, controller, or control circuitry. The processor may include an internal memory.

The processor of the electronic module 105 may receive power from the battery 230 and may be configured to distribute power to other components in the electronic module 105 and/or control power to other components in the electronic module 105. The battery 230 may be any suitable device for powering the electronic module 105. The battery 230 may be directly connected with one or more of the sensors, memory, and/or transceiver of the electronic module 105.

Fig. 3 illustrates an exemplary slider 116 for use with the inhaler 100. As described herein, the slider 116 can be mechanically coupled to the mouthpiece cover 130 of the inhaler such that the slider 116 engages the switch 222 in the electronic module 105 as the mouthpiece cover 130 is opened and/or closed. The slider 116 may include a distal end 302 (e.g., a base). The slider 116 may include an arm 304. An arm 304 may extend from the distal end 302. The arm 304 may define a clip 306. The clip 306 may be an enlarged portion of the arm 304. The clip 306 may be configured to engage the stop 217, as shown in fig. 2A and 2B. The arm 304 is flexible about its connection to the slider 116. For example, the arm 304 may be configured to flex toward the slider 116 or away from the slider 116 in response to an applied force. The clip 306 may have a sloped surface such that when the slider 116 is pressed into the slider guide 216, the arm 304 bends away from the slider 116 (e.g., until the clip 306 engages the stop 217), as shown in fig. 2A and 2B.

The slider 116 may define a spring seat 312. The spring seat 312 may be an upper horizontal surface of the slider 116. A spring cross 314 may extend from the spring seat 312. The spring cross 314 may be configured to extend within the slider spring 260 and be constrained to engage the slider spring 260 (as shown in fig. 2B). The slider 116 may define one or more ribs 316. Ribs 316 may define one or

more fingers

308, 310 that extend beyond spring cross 314. The finger 308 may be configured to engage the switch 222 of the inhaler 100. For example, finger 308 may include a horizontally extending portion 311. The horizontally extending portion 311 may extend in the opposite direction of the spring cross 314. One or more fingers 310 may be configured to limit the vertical travel of the slider 116. For example, when the slider spring 260 is compressed, the finger 310 may abut a surface within the slider guide 216 (as shown in fig. 2A and 2B).

Fig. 4A-4B are projection views of an exemplary slide 116. The rib 316 may be a rectangular protrusion extending along the length of the slider 116. The ribs 316 may be configured to engage (e.g., abut) an inner surface of the slider rail 216 such that the slider 116 is held in alignment within the slider rail 216. The slider 116 may define an intermediate surface 303. The ribs 316 may extend from the intermediate surface 303. Each rib 316 may include one of the

fingers

308, 310. For example, one of the ribs 316 may define the finger 308. The distal end 302 of the slider 116 may be offset from the finger 308. Finger 308 may define centerline 309. The distal end 302 of the slider 116 may be offset from the centerline 309 by a distance D1. The distal end 302 of the slider 116 may extend from the intermediate surface 303. The distal end 302 of the slider 116 may define a bottom surface 301. The bottom surface 301 may be configured to abut the yoke 170 of the inhaler 100. The bottom surface 301 may extend a distance D2 from the intermediate surface 303. For example, the distance D2 may be approximately 2.0mm (e.g., 2.0mm, with manufacturing tolerances of approximately +/-0.1 mm).

The slider 116 may define a spring seat 312 and a spring cross 314. The spring cross 314 may extend a distance D3 from the spring seat 312. For example, the distance D3 may be approximately 1.5mm (e.g., 1.5mm, manufacturing tolerance of approximately +/-0.1mm)

The arm 304 of the slider 116 may include a clip 306. The clip 306 may be an enlarged portion of the arm 304 configured as a stop mechanism. For example, the clip 306 may define a stopper surface 305. The stopper surface 305 may be configured to abut a stopper, such as the stopper 217 of the slider guide 216 of the cap 110, as shown in fig. 2A and 2B. The finger 308 may include a horizontally extending portion 311, and the horizontally extending portion 311 may extend vertically from a corresponding one of the ribs 316. For example, the horizontally-extending portion 311 may extend a distance D4 from a corresponding one of the 316 ribs. The distance D4 may be configured such that the horizontally extending portion 311 engages the switch 222 of the PCB118 (e.g., as shown in fig. 5A-5D) without impeding travel of the slider 116. For example, the distance D4 may be approximately 2.30mm (e.g., 2.30mm, with manufacturing tolerances of approximately +/-0.07 mm). Finger 308 may define a top surface 307. For example, top surface 307 may be defined by horizontally extending portion 311. Stopper surface 305 may be a distance D5 from top surface 307. Distance D5 may be configured to limit vertical travel of slider 116 within slider guide 216. For example, after the slider 116 activates the switch 222 on the PCB118 of the electronic module 105, the distance D5 may be configured to limit the vertical travel of the slider 116. For example, the distance D5 may be approximately 7.22 millimeters (e.g., 7.22 millimeters with manufacturing tolerances of approximately +/-0.09 millimeters). Top surface 307 may be a distance D6 from spring seat 312. For example, the distance D6 may be approximately 3.52mm (e.g., 3.52mm, with manufacturing tolerances of approximately +/-0.1 mm).

The slider 116 may define one or more second fingers 310. For example, one or more of the ribs 316 may define the second finger 310. The second finger 310 may extend a distance D7 from the spring seat 312. For example, the distance D7 may be about 3.12mm (e.g., 3.12mm, with manufacturing tolerances of approximately +/-0.1 mm).

Fig. 5A-5D illustrate the operation of the slider 116 of the exemplary inhaler 100 as the mouthpiece cover 130 is manipulated from a closed position to an open position (e.g., a partially open position). In particular, movement of the suction port cover 130 from the closed position to the open position may cause the slider 116 to move axially in a downward direction toward the suction port 120. As the slider 116 is moved in a downward direction, a portion of the slider 116 may be in physical contact with the switch 222, thereby activating the switch 222. Conversely, movement of the mouthpiece cover 130 from the open position to the closed position may cause the slider 116 to travel in an upward direction toward the cap 110. As the slider 116 moves in the upward direction, a portion of the slider 116 may be physically disconnected from the switch 222, thereby deactivating the switch 222.

More specifically, the yoke 170 may be configured to move up and down within the upper housing 140 of the inhaler 100 as the mouthpiece cover 130 opens and closes. The slider 116 may be operatively connected to the suction cap 130 by a yoke 170. The up and down movement of yoke 170 may cause slider 116 to activate switch 222 and/or deactivate switch 222, respectively. For simplicity, the suction cover 130 is illustrated in four positions (a closed position in fig. 5A, a first position in fig. 5B, a second position in fig. 5C, and a third position in fig. 5D). It should be noted, however, that when the suction cover 130 is opened, the suction cover 130 can be transitioned between any number of different positions as the suction cover 130 is transitioned from the closed position to the fully open position and vice versa.

As shown in fig. 5A, the slider 116 may be in the intermediate position when the suction port cover 130 is in the closed position. When the slider 116 is in the neutral position, the horizontally extending portion 311 of the slider 116 may be located between the top inner surface 220 of the cap 110 and the switch 222. When the slider 116 is in the neutral position, the slider spring 260 may be partially compressed. The distal end 302 of the slider 116 may be in contact with the top surface 172 of the yoke 170.

As shown in fig. 5B, the suction cap 130 can be opened to a first position. The first position may be a partially open position such that a portion of the suction opening 120 is exposed. The slider 116 may be in an upper position such that the horizontally extending portion 311 of the slider 116 may be closer to the top interior surface 220 of the cap 110 when the suction cap 130 is in the first position. For example, the horizontally extending portion 311 may be in contact with the top interior surface 220. The slider spring 260 may be further compressed beyond the partially compressed position associated with the intermediate position of the slider 116. When the slide 116 is in the up position, the distal end 302 of the slide 116 may remain in contact with the top surface 172 of the yoke 170.

As shown in fig. 5C, the suction cap 130 can be opened to a second position. The second position may be a partially open position such that the suction opening 120 is more exposed than in the first position. For example, the mouthpiece cover 130 is more open in the second position than in the first position. The slider 116 can be in a contact position such that the horizontally extending portion 311 of the slider 116 contacts the switch 222 when the suction cap 130 is in the second position. The switch 222 may be activated when the slider 116 is in the contact position. When the slider 116 is in the contact position, the distal end 302 of the slider 116 may remain in contact with the top surface 172 of the yoke 170.

As shown in fig. 5D, the suction cap 130 can be opened to a third position. The third position may be a partially open position such that the suction opening 120 is more exposed than in the second position. For example, the suction cap 130 is more open in the third position than in the second position. When the suction cap 130 is in the third position, the horizontally extending portion 311 of the slider 116 may remain in contact with the switch 222. When the suction cap 130 is in the third position, the horizontally extending portion 311 of the slider 116 may activate the switch 222 to a maximum switch travel angle. When slider 116 is in the activated position, distal end 302 of slider 116 may remain in contact with top surface 172 of yoke 170.

Fig. 6 illustrates an exemplary mouthpiece 620 of an inhaler 600 (e.g., such as inhaler 100). The example suction opening 620 may be a backup suction opening having a plurality of (e.g., four)

bypass ports

623, 624, 625, 626. The

bypass ports

623, 624, 625, 626 may allow air to flow independent of the airflow path (e.g., such as the airflow path 189 shown in FIG. 1D) such that when a patient inhales or inhales through the mouthpiece 620, a portion of the air is drawn from the airflow path by the patient and another portion of the air is not drawn from the airflow path by the patient. For example, the

bypass ports

623, 624, 625, 626 may extend through the suction opening 120 (outside of the airflow path) from the front surface 621 of the suction opening 620 to the rear surface (not shown) of the suction opening 620. The

bypass ports

623, 624, 625, 626 may reduce the flow rate through the airflow channels to reduce dependence on the flow rate of the inhaler 100 and/or deliver the appropriate dose of medicament through the airflow channels 189 at a lower flow rate.

The suction opening 620 may have a front surface 621 that defines a flow passage opening 622 and a plurality of

bypass ports

623, 624, 625, 626. The flow channel opening 622 may be an inlet and/or outlet tube of the airflow channel of the inhaler 600. For example, the airflow path may be a breath-actuated airflow path for carrying dry powder medicament from the inhaler 600, starting at the exhaust port 610 and ending at an airflow path opening 622. The

bypass ports

623, 624, 625, 626 may be configured to allow air to flow from an area outside the suction port 620 to the front surface 621 independent of the airflow path when a low pressure caused by breathing is applied to the front surface 621. The

bypass ports

623, 624, 625, 626 may reduce the linear flow rate of air through the airflow channel and the flow channel opening 622. The reduction in the linear flow rate of air through the flow channel opening 622 may reduce fluctuations in the velocity of the air flowing through the flow channel, such as changes in low pressure due to breathing. That is, the

bypass ports

623, 624, 625, 626 can reduce the flow rate of fine-grained medicament (e.g., most active substances below 5 μm) depending on delivery. The fine particle dose delivered may be measured according to the european pharmacopoeia 6.0 s.2.9.18 using an Anderson cascade impactor.

The

bypass ports

623, 624, 625, 626 may reduce the formation of secondary vortices (stall airflow in the vortex chamber of the airflow path) and/or high steepness of the vortex chamber wall (areas of high sheet), which may adversely affect the performance of the inhaler 600.

The ratio of the sum of the cross-sectional areas of the

bypass ports

623, 624, 625, 626 to the cross-sectional area of the flow passage opening 622 may be configured such that at least about 5%, preferably at least about 15%, more preferably from about 5% to about 50%, more preferably from about 15% to about 40%, even more preferably from about 20% to about 30%, of the resulting airflow is directed through the

bypass ports

623, 624, 625, 626 when the low pressure caused by the pressure breathing is applied to the front surface 621 of the suction port 620.

For example, the sum of the cross-sectional areas of the

bypass ports

623, 624, 625, 626 can be from about 0.75mm²To about 20mm²More preferably from about 5mm²To about 16mm²And even more preferably from about 9mm²To about 11mm²。

The flow channel opening 622 may have a cross-sectional area of from about 25mm²To about 50mm²More preferably, from about 30mm²To about 45mm²And even more preferably, from about 35mm²To about 45mm²。

A suitable airflow resistance associated with the airflow passage 189 of the inhaler 600 having the electronics module and the bypass vents 623, 624, 625, 626 may be at 0.015kPa^0.5LPM to 0.031kPa^0.5In the/LPM range. More preferably, with the airflow passage 189 of the inhaler 600 having the electronics module and

bypass ports

623, 624, 625, 626The closed airflow resistance can be 0.018kPa^0.5LPM to 0.028kPa^0.5In the/LPM range. Even more preferably, the airflow resistance associated with the airflow channel 189 of the inhaler 600 having the electronics module and the bypass vents 623, 624, 625, 626 can be at 0.021kPa^0.5LPM to 0.025kPa^0.5Suitable airflow rates associated with the airflow passages 189 of the inhaler 600 having the electronics module and

bypass ports

623, 624, 625, 626 may range from 70LPM to 105LPM when a pressure drop of 4.0kPa is applied across the airflow passages 189 of the inhaler 600 in the LPM range. More preferably, the airflow rate associated with the airflow passage 189 of the inhaler 600 having the electronics module and

bypass ports

623, 624, 625, 626 can be in the range of 75LPM to 100LPM when a pressure drop of 4.0kPa is applied to the airflow passage 189 of the inhaler 600. Even more preferably, inhalation with the electronic module and

bypass ports

623, 624, 625, 626 when a pressure drop of 4.0kPa is applied to the airflow passage 189 of the inhaler 600

The gas flow rate associated with the gas flow passage 189 of the insert 600 may be in the range of 80LPM to 95 LPM.

Claims

1. An electronic module for an inhaler, the electronic module comprising:

an electronic module cap including a slider guide extending from a top interior surface of the electronic module cap;

a printed circuit board having a plurality of openings and a switch mounted on the openings;

a slider configured to engage the slider rail, wherein a distal end of the slider engages a yoke of the inhaler such that vertical movement of the yoke is transferred to the slider; and

a slider spring received by the slider rail and engaging an upper portion of the slider, the slider spring configured to contact a distal end of the slider with the yoke;

wherein the slider is configured to operate the switch when the yoke is operated in the vertical orientation.

2. The electronic module of claim 1, wherein the slider guide comprises:

an aperture extending from a distal end of the slider guide to a top interior surface of the electronic module cap, and wherein the aperture is configured to receive the slider, an

A channel extending along a side of the slider rail, wherein the channel is configured to accept an arm of the slider, and wherein the channel comprises a clip configured to retain the slider in the slider rail.

3. The electronic module of claim 1, wherein the switch is configured to activate and deactivate the electronic module when operated by the slider.

4. The electronic module of claim 3, wherein the switch, when activated, provides a wake-up signal to the electronic module, the wake-up signal causing the electronic module to change from a first power state to a second power state.

5. The electronic module of claim 1, wherein the slider includes a spring seat configured to engage the slider spring, the slider including a spring cross extending from the spring seat, and wherein the spring cross is configured to extend within the slider spring and is constrained to engage the slider spring.

6. The electronic module of claim 1, wherein the slider guide comprises a stop configured to engage a clip of the slider, wherein the stop limits vertical travel of the slider when the yoke is operated vertically.

7. The electronic module of claim 6, wherein the stop is configured to limit vertical travel of the slider after the slider activates the switch.

8. The electronic module of claim 1, wherein the slider is configured to contact the switch when a mouthpiece cover is moved from a closed position to an open position to expose a mouthpiece of the inhaler.

9. The electronic module of claim 8, wherein a bellows and a spring are coupled to the suction cap such that the bellows and the spring move in a direction away from the switch when the suction cap is moved to expose the suction.

10. The electronic module of claim 8, wherein the suction port cover is operatively connected to the slider by the yoke such that the switch is operated by the slider when the suction port cover is moved to an open position to expose the suction port.

11. The electronic module of claim 1, wherein the electronic module cap is configured to be removably attached to an outer housing of the inhaler.

12. The electronic module of claim 1, wherein the electronic module cap is permanently attached to an outer housing of the inhaler.

13. The electronic module of claim 12, wherein the outer housing comprises an upper housing and a lower housing, the electronic module cap is permanently attached to the upper housing, and the lower housing comprises a suction opening and a suction opening cover.

14. An inhaler, the inhaler comprising:

a suction port;

a suction port cover;

an outer housing;

a yoke;

dry powder medicine; and

an electronic module, the electronic module comprising:

an electronic module cap comprising a slider guide extending from a top interior surface of the electronic module cap;

a slider configured to engage the slider rail, wherein a distal end of the slider engages the yoke such that vertical movement of the yoke is transferred to the slider; and

15. The inhaler of claim 14, wherein the slider guide comprises an aperture extending from a distal end of the slider guide to a top interior surface of the inhaler, and wherein the aperture is configured to receive the slider.

16. An inhaler according to claim 15, wherein the slider guide comprises a channel extending along one side of the slider guide and wherein the channel is configured to receive an arm of the slider.

17. The inhaler of claim 16, wherein the channel comprises a clip configured to retain the slider in the slider guide.

18. An inhaler according to claim 14, wherein the switch is configured to activate and deactivate the electronic module when operated by the slider.

19. The inhaler of claim 18, wherein the switch, when activated, provides a wake-up signal to the electronics module, the wake-up signal causing the electronics module to change from a first power state to a second power state.

20. The inhaler of claim 14, further comprising a stop configured to engage a clip of the slider, wherein the stop is configured to limit vertical travel of the slider after the slider activates the switch.

21. An inhaler according to claim 14, wherein the slider comprises a spring seat configured to engage the slider spring, the slider comprising a spring cross extending from the spring seat, and wherein the spring cross is configured to extend within the slider spring and is constrained to engage the slider spring.

22. The inhaler of claim 14, wherein the electronics module comprises an electronics module cap configured to be removably attached to an outer housing of the inhaler, and

wherein the outer housing comprises an upper housing configured to engage the electronic module cap and a lower housing configured to engage the suction opening and the suction cover.

23. The inhaler of claim 22, wherein the electronics module cap comprises a top interior surface, and wherein the electronics module cap is configured to be removably attached to an outer housing of the inhaler; and

wherein a top surface of the outer housing includes an aperture configured to allow the slider to extend into the outer housing.

24. An inhaler according to claim 22, wherein the mouthpiece cover is operatively connected to the slide by the yoke such that the switch is operated by the slide when the mouthpiece cover is opened to an open position such that the mouthpiece is exposed.

25. An inhaler according to claim 24, wherein the slider is configured to contact the switch when the mouthpiece cover is moved from the closed position to the open position to expose the mouthpiece.